Role of corollary discharge in space constancy

Stark, Lawrence; Bridgeman, Bruce

doi:10.3758/bf03203050

Cited by 202 publications

(101 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This implies that under normal perceptual conditions the efference copy signal of eye position after the saccade plays only a minor role in transsaccadic localization; rather, transsaccadic displacement judgements and perceived visual stability are based on the evaluation of postsaccadic landmark objects. The importance of visual reference frames is also supported by earlier experiments, which indicated that in normal visual scenes, visual information dominates over eye position information in judgements of visual direction, when both signals are in conflict (Matin, Picoult, Stevens, Edwards, Young, & MacArthur, 1982;Stark & Bridgeman, 1983).…”

Section: Discussionsupporting

confidence: 54%

Localization of targets across saccades: Role of landmark objects

2004

View full text Add to dashboard Cite

Saccadic eye movements are required to bring different parts of the visual world into the foveal region of the retina. With each saccade, the images of the objects drastically change their retinal positionsÐnevertheless, the visual world appears continuous and does not seem to jump. How does the visual system achieve this continuous and stable percept of the visual world, despite the gross changes of its retinal projection that occur with each saccade? The present paper argues that an important factor of this type of space constancy is formed by the reafferent information, i.e., the visual display that is found when the eyes land. Three experiments demonstrate that objects present across the saccade can serve as landmarks for postsaccadic relocalization. The basic experimental manipulation consisted of a systematic displacement of these landmark objects during the saccade. The effectiveness of the landmarks was determined by analysing to what degree they modify the perceived shift of a small saccade target that was blanked for 200 ms during and after the saccade. A first experiment studied the spatial range where objects become effective as landmarks. The data show that landmarks close to the saccade target and horizontally aligned with the target are specifically effective. The second experiment demonstrates that postsaccadic localization is normally based on relational information about relative stimulus positions transferred across the saccade. A third experiment studied the effect of a prominent background frame on transsaccadic localization; the results suggest that background structures contribute only little to transsaccadic localization.

show abstract

Section: Discussionsupporting

confidence: 54%

Localization of targets across saccades: Role of landmark objects

2004

View full text Add to dashboard Cite

show abstract

“…This confirms the conclusion of Stark and Bridgeman (1983) from an indirect method: a difficult color discrimination in a small target, possible only in fovea1 vision, could be performed even during the dynamic phase of eyepress (white subjects experienced apparent motion). Thus, we knew that the fovea continued to fixate the target even during apparent motion.…”

Section: Discussionsupporting

confidence: 83%

“…Our results can be interpreted in terms of an analysis of the eye-press developed by Stark and Bridgeman (1983) and . The classical analysis (Decartes, 1972;Helmholtz, 1867), that finger pressure on a monocularly viewing eye causes passive eye movement and motion of the visual world on the retina, does not apply to static or slowly changing pressure.…”

Section: Discussionmentioning

confidence: 69%

“…A structured visual field reduces the perceptual effects of changed oculomotor efference (Matin et al, 1982). A pointing measure, however, shows effects of changed efference both with and without a structured visual field (Stark & Bridgeman, 1983).…”

Section: Discussionmentioning

confidence: 94%

“…Our method is a press with the finger on the outer canthus of the eye, a technique which has undergone development in the past few years (Stark & Bridgeman, 1983;Bridgeman & Fishman, 1985).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Influence of mechanical disturbance on oculomotor behavior

1989

Self Cite

View full text Add to dashboard Cite

Ahatraet-Using a binocular search coil technique, we measured oculomotor behavior during gentle pressing with a finger on the outer canthus of one eye. With a steadily pressed viewing eye, and the fellow eye occluded, the occluded eye deviates while the pressed eye does not. If the eye is rapidly pressed and released, the compensation of rotational force in the pressed eye becomes incomplete, so that both eyes move. At high frequencies of press (> 1 Hz) the pressed eye is deviated and the contralateral eye no longer moves. In darkness the pressed eye always rotates but the contralateral eye never does, demonstrating that any inflow from proprio~ptors sensing rotation of the pressed eye does not affect oculomotor posture as measured in the fellow eye. With binocular viewing the results are more variable. On some trials neither eye moves, while on others both move. The results can be interpreted as a Hering's law controlled attempting to reconcile disparate inputs from the two eyes. The results confirm and extend, with objective measures, earlier conclusions from subjective experiments.

show abstract

Oculomotor Stability and the Functions of the Postorbital Bar and Septum

Heesy

Ross

Demes

PRIMATE ORIGINS: Adaptations and Evolution

View full text Add to dashboard Cite

Role of corollary discharge in space constancy

Cited by 202 publications

References 26 publications

Localization of targets across saccades: Role of landmark objects

Localization of targets across saccades: Role of landmark objects

Influence of mechanical disturbance on oculomotor behavior

Oculomotor Stability and the Functions of the Postorbital Bar and Septum

Contact Info

Product

Resources

About